US5474435A - Device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies - Google Patents
Device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies Download PDFInfo
- Publication number
- US5474435A US5474435A US08/150,050 US15005093A US5474435A US 5474435 A US5474435 A US 5474435A US 15005093 A US15005093 A US 15005093A US 5474435 A US5474435 A US 5474435A
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- United States
- Prior art keywords
- sieve
- granules
- strands
- cooling
- cutting roll
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/24—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by shooting or throwing the materials, e.g. after which the materials are subject to impact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/23—Hay wafering or pelletizing means
Definitions
- the invention relates to a device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies with a cooling unit which feeds strands into a bath of cooling liquid and to which is connected a granulator housing, which contains a cutting roll and to which is connected an outlet duct with a sieve to separate the thermoplastic material from the cooling liquid.
- the cooling unit comprises a discharge channel, whose upper end is supplied with cooling water and whose bottom end opens into a granulator housing containing a cutting roll.
- An outlet duct is attached to the granulator housing, and in particular in the horizontal direction, since the granulator housing deflects, owing to a rounded rear wall, the granules which are cut from the strands by the cutting roll.
- the granules leave the housing essentially in horizontal direction, a feature that is facilitated by a cooling water feeder provided in the housing close to the cutting point of the cutting roll.
- the cooling water floods the granules that have been cut off along the rounded rear wall of the granulator housing in the horizontal direction beyond a sieve arranged in the bottom of the horizontal outlet duct, where the water accompanying the granulate is drawn off in part by the sieve as a consequence of gravity.
- the intensity of this water separation is relatively low, since, as stated, only gravity acting on the water is utilized for this purpose. The result is that the granulate leaving the outlet duct still exhibits a high degree of surface moisture.
- the invention is based on the problem of increasing the degree of drying of the granulate which has been separated by means of a cutting roll from wet or moist strands, and at the same time providing a special drier that has a low energy requirement.
- the invention by arranging the sieve in such a manner that the granules separated from the strands by the cutting roll impinge directly on the sieve at essentially the same speed as that imparted to the granules by the cutting roll.
- the invention exploits the significant amount of kinetic energy that is transferred from the high speed cutting roll to the granules, in order to spin the water from the granules.
- the granules are namely cut by the individual knives of the cutting roll and thrown approximately tangentially from the cutting roll.
- the results for the granules are speeds in the order of magnitude of 10 m per second. If a granule impinges at such a speed on a sieve, water clinging to the granule is thrown almost completely from it, whereby the water passes through the sieve and thus can be extracted.
- the sieve is arranged in such a manner that the granules separated from the strands by the cutting roll impinge directly on the sieve without any intermediate deflection or point of impact.
- the kinetic energy imparted to the granules is automatically generated owing to the necessary drive to the cutting roll, so that to accelerate the granules to virtually the circumferential speed of the cutting roll no additional energy is required.
- the sieve is arranged at such an angle with respect to the direction of impingement of the granules that said granules impinge in the direction of a sieve that follows.
- another sieve is utilized to throw the residual water from the granulate, since in this case the granules impinge on a sieve twice in succession.
- This serial connection of the sieves can be provided also multiple times.
- At least one of the sieves can be designed as a curved sieve, as shown, e.g. in the DE-PS 31 05 609.
- This curved sieve can be arranged in such a manner that granules either impinge obliquely on it or are fed tangentially to the curved sieve.
- a feeder for air to be blown on the sieve is assigned to at least one sieve.
- the air blown thus into the flow of the granulate escapes then over the sieves and drags with it any water clinging to said sieve.
- the amount of water to be extracted through the sieves following the granulator can be decreased by attaching a pre-separator in front of the granulator housing.
- a pre-separator is known from the DE-PS 33 36 032. Then only a relatively small amount of residual water reaches the granulator, so that only said water has to be extracted from the sieves.
- the heat intrinsic to the granules can be utilized by a well-known method to extract through evaporation the residual water from the granules.
- the cooling of the strands is set in such a manner that the heat intrinsic to the granules is left; and, following impingement of the granules on the sieve or sieves, said heat suffices to almost totally evaporate the water still wetting the granules.
- FIG. 1 depicts M device with a sieve attached to the granulator and a cooling unit comprising conveyor belts.
- FIG. 2 depicts the design of the sieve attached to the granulator as a curved sieve.
- FIG. 3 depicts the device with two sieves connected in succession and a discharge channel as the cooling unit.
- FIG. 4 depicts a plurality of sieves attached to the granulator with inlets for air to be blown in.
- FIG. 1 is a diagrammatic, simplified view of a device for cooling, granulating and drying molten strands 1 emerging from dies of the die head 2.
- the strands 1 are intercepted by the feed unit 3, whose left end is provided with an overflow 4 for the entry of cooling water, which flows off by way of the feed unit 3 and thus carries along the strands 1.
- the feed unit 3 feeds the strands 1 by way of a metal guide plate 5 to a pair of conveyor belts 6 and 7, which convey the strands 1 in such a manner by means of deflecting rollers 8, 9, or 10, 11 that the parallel members of the conveyor belts 6 and 7 cause the strands to be fed in the direction of the granulator housing 12.
- the strands 1 are grasped by both feed rolls 15 and 16 directly behind the inlet 14 of the granulator housing 12 and fed at a defined rate of advance over the stationary knife 17 of the cutting roll 18.
- the cutting roll 18 rotates in the direction of the drawn arrow at a high speed, e.g. 1,000 rpm.
- the individual knives of the cutting roll 18 cut in accordance with the rate of advance of the strands i correspondingly long granules 19 from the strands 1, which are spun away from the cutting roll 18 at the same speed owing to the relatively high circumferential speed of the cutting roll 18.
- the granules 19 are thrown approximately tangentially from the cutting roll 18 and in particular according to the drawn arrow at a more or less large angle away from the support 20 of the stationary knife 17.
- the outlet duct 21, which contains the sieve 22, is flanged to the granulator housing 12.
- the sieve 22 projects at such an angle within outlet duct 21 so far in the direction of the granulator housing 12 that the granules 19 impinge directly on the sieve 22 from the cutting roll 18.
- the kinetic energy imparted to the granules 19 by the cutting roll 18 is utilized extensively for the granules 19 to impinge on the sieve 22, so that water adhering to the granules 19 is almost totally spun off from it. Then the water can flow off through the sieve 22 in accordance with the drawn curved arrows and flows off down inside the outlet duct 21 and through the discharge pipe 23.
- the device described above employs without additional energy a special drier, namely the sieve 22, whereby the kinetic energy automatically imparted to the granules 19 by the cutting roll 18 is totally exploited for the drying process.
- FIG. 2 shows a modification of the device according to FIG. 1, where the issue is the design of the sieve, which is designed here as a curved sieve 24.
- the granules 10 impinge at a very obtuse angle or almost tangentially on the curved sieve 24, whereby, as in the case of the device according to FIG. 1, first the water adhering to the granules 19 is largely thrown off by the impact.
- FIG. 3 shows another modification of the device with respect to FIG. 1, in which the cooling unit comprises in essence a discharge channel 25, which is fed by the feed unit 3 the cooling water coming from the overflow 4.
- the pre-separator sieve 26, which acts as an outlet, is installed into the discharge channel 25; said pre-separator sieve is used when the cooling segment specified by the discharge channel 25 provides adequate cooling for the strands 1, so that the cooling water can be extracted largely before the granulator housing 12.
- the cooling water flows through the sieve 26 into the discharge funnel 27 and from there is discharged through the neck 28.
- This pre-separation of the cooling water at the end of the discharge channel 25 facilitates the drying of the granules 19 following cutting by means of the cutting roll 18.
- Another sieve 30 is arranged close by opposite sieve 29, so that granules 19 bouncing off the sieve 29 impinge then on the sieve 30.
- residual water can be thrown from the granules once again at the sieve 30.
- the granules 19 falling off the sieve 30 impinge then on the third sieve 31, which is provided in the outlet duct 21 and over which they then trickle down to a certain extent, whereby once again any existing residual water can be separated off.
- FIG. 4 depicts an embodiment in which first, as with the embodiment according to FIG. 1, there is a sieve 32, which serves for the granules 19 to impinge on and to which are attached two other sieves 33 and 34 in a zig-zig arrangement for the granules 19 to trickle down.
- the two air feeders 35 and 36 are provided through which an air current is blown on the sieve 33 or sieve 34.
- the danger of water adhering to the sieves is thus less at the sieve 32, because the granules 19 impinge on the sieve 32 at a relatively high kinetic energy.
- the air blown in through the air feeders 35 and 36 into the outlet duct 21 passes to a significant degree through the sieves 33 and 34 and in so doing takes the water adhering to said sieve with it.
- varying cooling units can be attached in front of the granulator housing 12, thus not only the conveyor belts 6 and 7 or the discharge channel 25. It is also possible, e.g. to connect a water bath guiding the strands to be cooled in front of the granulator housing.
- sieve is understood all designs in which a metal plate or the like is provided with a plurality of passages of such a size that the cooling water, but not the granulate, can pass, e.g. thus a perforated plate or a bar sieve.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
A device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies includes a cooling unit for applying a cooling liquid to the strands and a granulator housing with a cutting roll for granulating the strands. The granulator housing is connected to an outlet duct with a sieve to separate the thermoplastic material from the cooling liquid. The sieve is arranged so that the granules separated from the strands by the cutting roll impinge directly on the sieve at basically the same speed as that imparted to the granules by the cutting roll.
Description
The invention relates to a device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies with a cooling unit which feeds strands into a bath of cooling liquid and to which is connected a granulator housing, which contains a cutting roll and to which is connected an outlet duct with a sieve to separate the thermoplastic material from the cooling liquid.
Such a device is known from the DE-PS 26 27 263. In this device the cooling unit comprises a discharge channel, whose upper end is supplied with cooling water and whose bottom end opens into a granulator housing containing a cutting roll. An outlet duct is attached to the granulator housing, and in particular in the horizontal direction, since the granulator housing deflects, owing to a rounded rear wall, the granules which are cut from the strands by the cutting roll. The granules leave the housing essentially in horizontal direction, a feature that is facilitated by a cooling water feeder provided in the housing close to the cutting point of the cutting roll. The cooling water floods the granules that have been cut off along the rounded rear wall of the granulator housing in the horizontal direction beyond a sieve arranged in the bottom of the horizontal outlet duct, where the water accompanying the granulate is drawn off in part by the sieve as a consequence of gravity. The intensity of this water separation is relatively low, since, as stated, only gravity acting on the water is utilized for this purpose. The result is that the granulate leaving the outlet duct still exhibits a high degree of surface moisture.
The invention is based on the problem of increasing the degree of drying of the granulate which has been separated by means of a cutting roll from wet or moist strands, and at the same time providing a special drier that has a low energy requirement.
This problem is solved by The invention by arranging the sieve in such a manner that the granules separated from the strands by the cutting roll impinge directly on the sieve at essentially the same speed as that imparted to the granules by the cutting roll.
The invention exploits the significant amount of kinetic energy that is transferred from the high speed cutting roll to the granules, in order to spin the water from the granules. The granules are namely cut by the individual knives of the cutting roll and thrown approximately tangentially from the cutting roll. The results for the granules are speeds in the order of magnitude of 10 m per second. If a granule impinges at such a speed on a sieve, water clinging to the granule is thrown almost completely from it, whereby the water passes through the sieve and thus can be extracted. To achieve this goal, the sieve is arranged in such a manner that the granules separated from the strands by the cutting roll impinge directly on the sieve without any intermediate deflection or point of impact.
The kinetic energy imparted to the granules is automatically generated owing to the necessary drive to the cutting roll, so that to accelerate the granules to virtually the circumferential speed of the cutting roll no additional energy is required.
Expediently the sieve is arranged at such an angle with respect to the direction of impingement of the granules that said granules impinge in the direction of a sieve that follows. In this case another sieve is utilized to throw the residual water from the granulate, since in this case the granules impinge on a sieve twice in succession. This serial connection of the sieves can be provided also multiple times.
It is also possible to design at least one of the sieves as a curved sieve, as shown, e.g. in the DE-PS 31 05 609. This curved sieve can be arranged in such a manner that granules either impinge obliquely on it or are fed tangentially to the curved sieve.
To extract the cooling liquid which may or may not cling to the sieves, a feeder for air to be blown on the sieve is assigned to at least one sieve. The air blown thus into the flow of the granulate escapes then over the sieves and drags with it any water clinging to said sieve.
The amount of water to be extracted through the sieves following the granulator can be decreased by attaching a pre-separator in front of the granulator housing. Such a pre-separator is known from the DE-PS 33 36 032. Then only a relatively small amount of residual water reaches the granulator, so that only said water has to be extracted from the sieves.
The heat intrinsic to the granules can be utilized by a well-known method to extract through evaporation the residual water from the granules. To achieve this goal, the cooling of the strands is set in such a manner that the heat intrinsic to the granules is left; and, following impingement of the granules on the sieve or sieves, said heat suffices to almost totally evaporate the water still wetting the granules.
Embodiments of the invention are shown in the Figures.
FIG. 1 depicts M device with a sieve attached to the granulator and a cooling unit comprising conveyor belts.
FIG. 2 depicts the design of the sieve attached to the granulator as a curved sieve.
FIG. 3 depicts the device with two sieves connected in succession and a discharge channel as the cooling unit.
FIG. 4 depicts a plurality of sieves attached to the granulator with inlets for air to be blown in.
FIG. 1 is a diagrammatic, simplified view of a device for cooling, granulating and drying molten strands 1 emerging from dies of the die head 2. The strands 1 are intercepted by the feed unit 3, whose left end is provided with an overflow 4 for the entry of cooling water, which flows off by way of the feed unit 3 and thus carries along the strands 1. Then the feed unit 3 feeds the strands 1 by way of a metal guide plate 5 to a pair of conveyor belts 6 and 7, which convey the strands 1 in such a manner by means of deflecting rollers 8, 9, or 10, 11 that the parallel members of the conveyor belts 6 and 7 cause the strands to be fed in the direction of the granulator housing 12. Behind the outlet of the two conveyor belts 6 and 7 in the region between the deflecting rollers 9 and 10 there is another metal guide plate 13, which feeds the strands 1 to the inlet 14 of the granulator housing 12. The cooling water delivered by the feed unit 3 flows within this cooling unit over the metal guide plate 5, between the two conveyor belts 6 and 7 and off by way of the metal guide plate 13, thus cooling the strands 1 and flowing into the inlet 14 of the granulator housing 12.
The strands 1 are grasped by both feed rolls 15 and 16 directly behind the inlet 14 of the granulator housing 12 and fed at a defined rate of advance over the stationary knife 17 of the cutting roll 18. The cutting roll 18 rotates in the direction of the drawn arrow at a high speed, e.g. 1,000 rpm. The individual knives of the cutting roll 18 cut in accordance with the rate of advance of the strands i correspondingly long granules 19 from the strands 1, which are spun away from the cutting roll 18 at the same speed owing to the relatively high circumferential speed of the cutting roll 18. At the same time the granules 19 are thrown approximately tangentially from the cutting roll 18 and in particular according to the drawn arrow at a more or less large angle away from the support 20 of the stationary knife 17.
The outlet duct 21, which contains the sieve 22, is flanged to the granulator housing 12. The sieve 22 projects at such an angle within outlet duct 21 so far in the direction of the granulator housing 12 that the granules 19 impinge directly on the sieve 22 from the cutting roll 18. The kinetic energy imparted to the granules 19 by the cutting roll 18 is utilized extensively for the granules 19 to impinge on the sieve 22, so that water adhering to the granules 19 is almost totally spun off from it. Then the water can flow off through the sieve 22 in accordance with the drawn curved arrows and flows off down inside the outlet duct 21 and through the discharge pipe 23.
The device described above employs without additional energy a special drier, namely the sieve 22, whereby the kinetic energy automatically imparted to the granules 19 by the cutting roll 18 is totally exploited for the drying process.
FIG. 2 shows a modification of the device according to FIG. 1, where the issue is the design of the sieve, which is designed here as a curved sieve 24. In this case the granules 10 impinge at a very obtuse angle or almost tangentially on the curved sieve 24, whereby, as in the case of the device according to FIG. 1, first the water adhering to the granules 19 is largely thrown off by the impact. As the granules 19 continue their flight, they migrate over the curve of the curved sieve 24, where owing to this guide centrifugal force is exerted on the granules 19 and thus on the water adhering to said granules and the centrifugal force is also exploited to spin off the residual water.
FIG. 3 shows another modification of the device with respect to FIG. 1, in which the cooling unit comprises in essence a discharge channel 25, which is fed by the feed unit 3 the cooling water coming from the overflow 4. The pre-separator sieve 26, which acts as an outlet, is installed into the discharge channel 25; said pre-separator sieve is used when the cooling segment specified by the discharge channel 25 provides adequate cooling for the strands 1, so that the cooling water can be extracted largely before the granulator housing 12. Thus, the cooling water flows through the sieve 26 into the discharge funnel 27 and from there is discharged through the neck 28. This pre-separation of the cooling water at the end of the discharge channel 25 facilitates the drying of the granules 19 following cutting by means of the cutting roll 18.
As in the case of the device according to FIG. 1, the granules 19 impinge here on the sieve 29, which is arranged in a manner analogous to that of the sieve 22 in FIG. 1. Another sieve 30 is arranged close by opposite sieve 29, so that granules 19 bouncing off the sieve 29 impinge then on the sieve 30. Thus residual water can be thrown from the granules once again at the sieve 30. The granules 19 falling off the sieve 30 impinge then on the third sieve 31, which is provided in the outlet duct 21 and over which they then trickle down to a certain extent, whereby once again any existing residual water can be separated off.
FIG. 4 depicts an embodiment in which first, as with the embodiment according to FIG. 1, there is a sieve 32, which serves for the granules 19 to impinge on and to which are attached two other sieves 33 and 34 in a zig-zig arrangement for the granules 19 to trickle down. To extract water, which adheres in particular to the sieves 33 and 34 and which could prevent water from passing continuously, the two air feeders 35 and 36 are provided through which an air current is blown on the sieve 33 or sieve 34. The danger of water adhering to the sieves is thus less at the sieve 32, because the granules 19 impinge on the sieve 32 at a relatively high kinetic energy. The air blown in through the air feeders 35 and 36 into the outlet duct 21 passes to a significant degree through the sieves 33 and 34 and in so doing takes the water adhering to said sieve with it.
It must also be pointed out that varying cooling units can be attached in front of the granulator housing 12, thus not only the conveyor belts 6 and 7 or the discharge channel 25. It is also possible, e.g. to connect a water bath guiding the strands to be cooled in front of the granulator housing. In addition, by the term "sieve" is understood all designs in which a metal plate or the like is provided with a plurality of passages of such a size that the cooling water, but not the granulate, can pass, e.g. thus a perforated plate or a bar sieve.
Claims (8)
1. A device for cooling, granulating and drying molten strands (1) of synthetic thermoplastic material emerging from dies which comprises a cooling unit (6, 7; 25) for applying a cooling liquid onto the strands, a granulator housing (12) which is connected to said cooling unit and contains a cutting roll (18) for receiving and granulating the strands and ejecting granules along a path, and an outlet duct (21) which is connected to said granulator housing and provided with a sieve (22, 24, 29, 32) to separate the thermoplastic material from the cooling liquid, wherein the sieve (22, 24, 29, 32) is positioned in the path along which the granules (19) are ejected by the cutting roll (18) so that all the granules impinge directly on the sieve (22; 24; 29; 32) at essentially the same speed as the speed imparted to the granules (19) by the cutting roll (18), by which said speed throws the cooling liquid almost completely from the granules.
2. A device as claimed in claim 1, wherein the outlet duct is provided with a second sieve, and wherein the first mentioned sieve (22, 24, 29, 32) is arranged at such an angle with respect to the direction of impingement such that said granules bounce from said first mentioned sieve and impinge said second sieve (30).
3. A device as claimed in claim 1, further comprising a series of additional sieves (29, 30, 31; 32, 33, 34) arranged after the first mentioned sieve so that the granules successively impinge said series of sieves.
4. A device as claimed in claim 1, wherein the sieve is designed as a curved sieve (24).
5. A device as claimed in claim 1, further comprising a feeder (35; 36) for air to be blown on the sieve.
6. A device as claimed in any one of claims 1 to 5, further comprising a preseparator (26) between said cooling unit and said granulator housing for removing a portion of the cooling liquid from the strands.
7. A device as claimed in either of claims 2 or 3, wherein at least one of the sieves is designed as a curved sieve.
8. A device as claimed in either of claims 2 or 3, further comprising a feeder for air to be blown on at least one sieve.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE4209373.2 | 1992-03-23 | ||
DE4209373A DE4209373C1 (en) | 1992-03-23 | 1992-03-23 | |
PCT/EP1993/000604 WO1993018901A1 (en) | 1992-03-23 | 1993-03-16 | Device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies |
Publications (1)
Publication Number | Publication Date |
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US5474435A true US5474435A (en) | 1995-12-12 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US08/150,050 Expired - Fee Related US5474435A (en) | 1992-03-23 | 1993-03-16 | Device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies |
Country Status (7)
Country | Link |
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US (1) | US5474435A (en) |
EP (1) | EP0586695B1 (en) |
JP (1) | JPH0725089B2 (en) |
KR (1) | KR970010450B1 (en) |
CA (1) | CA2102922C (en) |
DE (2) | DE4209373C1 (en) |
WO (1) | WO1993018901A1 (en) |
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GB2305887A (en) * | 1995-10-04 | 1997-04-23 | Scheer & Cie C F | Plastic strand granulation plant with draining/drying module |
US5628947A (en) * | 1993-04-29 | 1997-05-13 | Rieter Automatik Gmbh | Process for the simultaneous drying and crystallization of crystallizable thermoplastic |
US5658601A (en) * | 1993-03-02 | 1997-08-19 | Kabushiki Kaisha Hoshi Plastic | Machine for cutting strand |
US5888554A (en) * | 1994-04-27 | 1999-03-30 | C.F. Scheer & Cie Gmbh & Co. | Apparatus for cooling and granulating plastic strands |
US6039905A (en) * | 1994-11-07 | 2000-03-21 | C.F.Scheer & Cie Gmbh & Co. | Apparatus and method for granulating plastic strands |
US6347932B1 (en) * | 1999-05-01 | 2002-02-19 | Han Jin Ind. Co., Ltd. | Apparatus for extruding and cutting resin strands |
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US20120032006A1 (en) * | 2010-08-03 | 2012-02-09 | Velcro Industries B.V. | Pelletizing |
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DE4413716C1 (en) * | 1994-04-20 | 1995-05-04 | Rieter Automatik Gmbh | Granulation apparatus for extruded materials |
JP5432437B2 (en) * | 2007-06-06 | 2014-03-05 | 株式会社日本触媒 | Polyether polymer pellets and classification method |
DE102010034119A1 (en) * | 2010-08-12 | 2012-02-16 | Automatik Plastics Machinery Gmbh | Device for drying granular grain, has rotor blade provided with dewatering wire aperture whose size is smaller than size of granular grain such that process fluid is separated by passage from wire front side to wire back side of grain |
CN110696215A (en) * | 2019-05-02 | 2020-01-17 | 湖南中塑新能源有限公司 | Rotary variable-speed water flow plastic particle forming device |
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- 1992-03-23 DE DE4209373A patent/DE4209373C1/de not_active Expired - Fee Related
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- 1993-03-16 DE DE59307249T patent/DE59307249D1/en not_active Expired - Fee Related
- 1993-03-16 KR KR1019930703524A patent/KR970010450B1/en not_active IP Right Cessation
- 1993-03-16 WO PCT/EP1993/000604 patent/WO1993018901A1/en active IP Right Grant
- 1993-03-16 JP JP5516241A patent/JPH0725089B2/en not_active Expired - Lifetime
- 1993-03-16 US US08/150,050 patent/US5474435A/en not_active Expired - Fee Related
- 1993-03-16 EP EP93920535A patent/EP0586695B1/en not_active Expired - Lifetime
- 1993-03-16 CA CA002102922A patent/CA2102922C/en not_active Expired - Fee Related
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Cited By (29)
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US5658601A (en) * | 1993-03-02 | 1997-08-19 | Kabushiki Kaisha Hoshi Plastic | Machine for cutting strand |
US5628947A (en) * | 1993-04-29 | 1997-05-13 | Rieter Automatik Gmbh | Process for the simultaneous drying and crystallization of crystallizable thermoplastic |
US5888554A (en) * | 1994-04-27 | 1999-03-30 | C.F. Scheer & Cie Gmbh & Co. | Apparatus for cooling and granulating plastic strands |
US6039905A (en) * | 1994-11-07 | 2000-03-21 | C.F.Scheer & Cie Gmbh & Co. | Apparatus and method for granulating plastic strands |
US5787604A (en) * | 1995-10-04 | 1998-08-04 | C.F. Scgeer & Cie. Gmbh & Co. | Plastic strand granulation plant having a draining and drying module |
GB2305887B (en) * | 1995-10-04 | 1999-04-14 | Scheer & Cie C F | A plastic strand granulation plant having a draining/drying module |
GB2305887A (en) * | 1995-10-04 | 1997-04-23 | Scheer & Cie C F | Plastic strand granulation plant with draining/drying module |
US6544447B1 (en) * | 1999-04-07 | 2003-04-08 | Thomas C. Faerber | Method of paper sludge and plastics formulation |
US20030151160A1 (en) * | 1999-04-07 | 2003-08-14 | Faerber Thomas C. | Pellet formulation |
US6347932B1 (en) * | 1999-05-01 | 2002-02-19 | Han Jin Ind. Co., Ltd. | Apparatus for extruding and cutting resin strands |
US20060015164A1 (en) * | 1999-07-07 | 2006-01-19 | Cardiac Pacemakers, Inc. | System and assembly having conductive fixation features |
US20020100355A1 (en) * | 2001-01-29 | 2002-08-01 | Rieter Automatik Gmbh | Knife arrangement for a granulator for granulating plastic ropes |
US6779429B2 (en) * | 2001-01-29 | 2004-08-24 | Reiter Automatik Gmbh | Knife arrangement for a granulator for granulating plastic ropes |
US20020167107A1 (en) * | 2001-05-09 | 2002-11-14 | Toshikazu Akao | Process for manufacturing granulated hydrophilic resin |
US8241541B2 (en) * | 2003-08-01 | 2012-08-14 | Bathium Canada Inc. | Cathode material for polymer batteries and method of preparing same |
US20070273062A1 (en) * | 2003-08-01 | 2007-11-29 | Bathium Canada Inc. | Cathode Material for Polymer Batteries and Method of Preparing Same |
US20070154587A1 (en) * | 2003-09-04 | 2007-07-05 | Scheer Bay Limited Partnership | System and apparatus for manufacturing thermoplastic micropellets |
US7393201B2 (en) * | 2003-09-04 | 2008-07-01 | Scheer Bay Limited Partnership | System and apparatus for manufacturing thermoplastic micropellets |
US20100297278A1 (en) * | 2007-07-25 | 2010-11-25 | Sven Fenchel | Strand pelletizer |
US20110121483A1 (en) * | 2007-10-23 | 2011-05-26 | Automatik Plastics Machinery Gmbh | Continuous casting device for producing pellets from plastic material and method for operating the same |
US8337189B2 (en) * | 2007-10-23 | 2012-12-25 | Automatik Plastics Machinery Gmbh | Continuous casting device for producing pellets from plastic material and method for operating the same |
US8939750B2 (en) * | 2007-10-23 | 2015-01-27 | Automatik Plastics Machinery Gmbh | Strand pelletizer |
CN102345973A (en) * | 2010-07-27 | 2012-02-08 | 自动化塑料机械有限责任公司 | Apparatus for drying pellets |
CN102345973B (en) * | 2010-07-27 | 2015-04-22 | 自动化塑料机械有限责任公司 | Apparatus for drying pellets |
US20120032006A1 (en) * | 2010-08-03 | 2012-02-09 | Velcro Industries B.V. | Pelletizing |
US8940207B2 (en) * | 2010-08-03 | 2015-01-27 | Velcro Industries B.V. | Pelletizing |
US20140117580A1 (en) * | 2011-07-06 | 2014-05-01 | Automatik Plastics Machinery Gmbh | Method and device for making granules |
US9808979B2 (en) * | 2011-07-06 | 2017-11-07 | Maag Automatik Gmbh | Method and device for making granules |
CN111391165A (en) * | 2020-04-16 | 2020-07-10 | 付子豪 | Injection molding raw material pretreatment process |
Also Published As
Publication number | Publication date |
---|---|
DE59307249D1 (en) | 1997-10-09 |
JPH0725089B2 (en) | 1995-03-22 |
EP0586695B1 (en) | 1997-09-03 |
KR970010450B1 (en) | 1997-06-26 |
EP0586695A1 (en) | 1994-03-16 |
CA2102922C (en) | 1997-11-25 |
JPH06502360A (en) | 1994-03-17 |
DE4209373C1 (en) | 1993-07-01 |
WO1993018901A1 (en) | 1993-09-30 |
CA2102922A1 (en) | 1993-09-24 |
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Owner name: RIETER AUTOMATIK GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HUNKE, FRIEDRICH;REEL/FRAME:006913/0975 Effective date: 19931019 |
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